List of practice Questions

The correct decreasing order of energy for the orbitals having, following set of quantum numbers:
(A) n = 3, l = 0, m = 0
(B) n = 4, l = 0, m = 0
(C) n = 3, l = 1, m = 0
(D) n = 3, l = 2, m = 1

The incorrect statement is

Which of the given reactions is not an example of a disproportionation reaction?

\(BeO\) reacts with \(HF\) in presence of ammonia to give \([A]\) which on thermal decomposition produces \([B]\) and ammonium fluoride. Oxidation state of Be in \([A]\) is _______

Observe structures of the following compounds

The total number of structures/compounds which possess asymmetric carbon atoms is _____.

100 g of an ideal gas is kept in a cylinder of 416 L volume at 27°C under 1.5 bar pressure. The molar mass of the gas is ________ g mol^–1. (Nearest integer). (Given : R = 0.083 L bar K^–1 mol^–1)

The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are

The Novolac polymer has mass of 963 g. The number of monomer units present in it are

4.0 moles of argon and 5.0 moles of PCl₅ are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm. The K_p for the reaction is
 [Given : R = 0.082 L atm K^–1 mol^–1 ]

Which of the following sets are correct regarding polymer?

1. Copolymer : Buna-S
2. Condensation polymer : Nylon-6,6
3. Fibres : Nylon-6,6
4. Thermosetting polymer : Terylene
5. Homopolymer : Buna-N

Choose the correct answer from given options below

The major product in the given reaction is

Which statement is not true with respect to nitrate ion test?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. 
Assertion A : \(LiF\) is sparingly soluble in water.
Reason R : The ionic radius of \(Li^+\) ion is smallest among its group members, hence has least hydration enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.

During halogen test, sodium fusion extract is boiled with concentrated HNO₃ to

\(\dot Cl + CH_4 → A + B\)
A and B in the above atmospheric reaction step are:

The hybridization of P exhibited in \(PF_5\) is \(sp_xd_y\). The value of y is _____ .

Number of lone pair(s) of electrons on central atom and the shape of BrF₃ molecule respectively, are

\(2\ g\) of a non-volatile non-electrolyte solute is dissolved in \(200\ g\) of two different solvents A and B whose ebullioscopic constants are in the ratio of \(1:8\). The elevation in boiling points of A and B are in the ratio \(\frac xy\ (x : y)\). The value of \(y\) is ______ . (Nearest Integer)

Given below are two statements:
Statement I : According to the Ellingham diagram, any metal oxide with higher ΔG° is more stable than the one with lower ΔG°.
Statement II :The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.
In the light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R.
Assertion A : Finest gold is red in colour, as the size of the particles increases, it appears purple then blue and finally gold.
Reason R : The colour of the colloidal solution depends on the wavelength of light scattered by the dispersed particles.
In the light of the above statements, choose the most appropriate answer from the options given below.

Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is____.

The dark purple colour of \(KMnO_4\) disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is :

Which one of the following is a reducing sugar?